Physics, Chemistry & Biology Practical Exam System

Name: Physics, Chemistry & Biology Practical Exam System
Brand: Beijing Zhixueyun Education Technology Co., Ltd.

Standardized hands-on exams for science labs — from scheduling to scoring in one platform

Built for regional unified practical exams and high-stakes graduation assessments, the platform supports three-tier deployment across education bureaus, schools, and exam venues. It covers exam scheduling, facial identity verification, digital answer sheets and OMR recognition, multi-camera proctoring, dual-marking arbitration with blind review quality control, AI-assisted scoring, and analytics — digitizing the full workflow for physics, chemistry, and biology practical exams.

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考试流程

硬件展示

Pain Points & Solutions

Challenge

Fragmented exam workflows and inefficient scheduling

Solution

Unified exam administration with one-click scheduling and paper distribution, supporting multiple subjects, papers, and mixed student cohorts

Challenge

Operational details hard to trace; heavy proctoring burden

Solution

Synchronized multi-camera recording from overhead, side, and microscope views with seat-level monitoring and online status tracking

Challenge

High marking workload and slow score aggregation

Solution

Automated digital answer sheet scoring + intelligent OMR recognition + AI-assisted marking with human-in-the-loop finalization and one-click score export

Core Features

From assessment and scoring to diagnostics and evaluation — covering the full teach-assess-learn cycle.

Feature 1

Computer-Based Testing

A new era of paperless assessment

End-to-end paperless: Digital workflow from item authoring and smart paper assembly to online exams and auto-marking.
Rich question types: Hands-on tasks, drawing, formula derivation, circuit wiring and other subject-specific assessments.
Secure & efficient: Timed submission, random draws, paper shuffling, anti-cheating monitoring, reports in minutes.
Green & sustainable: Cuts paper, printing, logistics and storage costs.

Paperless exams, online answering and marking interfaces

Feature 2

Real-Time Scoring

Every practice becomes a step forward

Objective auto-scoring: Instant judgment with model answers and detailed explanations.
Subjective AI scoring: Recognizes formulas, chemical equations and lab step descriptions.
Process-based scoring: Millisecond capture of virtual lab actions — reward compliance, warn on errors.
Instant feedback: Students see why they missed; teachers see class-wide patterns and adjust instruction.

AI Auto-Scoring

Precise, efficient intelligent marking

Subjective questions are no longer a bottleneck

Smart recognition: Handwritten formulas, equations and non-standard lab steps.
Process evaluation: Full-process dynamic scoring in virtual labs with real-time compliance feedback.
Fast & consistent: Far faster than manual marking with unified standards and less bias.

Feature 3

Intelligence

The smart engine for the full teaching workflow

Smart paper assembly: One-click papers by knowledge point and difficulty — personalized per student.
Smart proctoring: Cameras plus AI vision to detect anomalies and alert instantly.
Smart diagnostics: Multi-dimensional analytics to pinpoint weak knowledge areas.
Smart recommendations: Videos, variant drills and readings for personalized learning paths.

Teaching quality and analytics dashboards

Feature 4

Precision Assessment

From scores to deep competency insight

Multi-dimensional data: Thinking process, operation traces, response time and other process data.
360° competency profile: Knowledge mastery, lab skills, logical reasoning and more.
Visual reports: Class analysis, individual reports and knowledge maps.
Personalized guidance: Differentiated teaching plans tailored to each learner.

Deployment Architecture

Three-tier private deployment: regional supervision platform + school-level platforms + student lab terminals. School data is isolated; exam and answer data aggregated to the regional tier via encrypted channels. Student terminals support Windows, Linux, and domestic operating systems — one client covers daily lab lessons and formal exams.

•Regional platform deployable in education bureau data center or government cloud; schools connect via dedicated line/VPN
•One school server (or VM) per school; admin accessed via browser without client installation
•Student lab terminals as cross-platform native clients supporting Windows, Linux, macOS, and major domestic OS
•AI review, OMR recognition, and facial verification services deployable per school or shared regionally
•Offline mode: terminals queue answer sheets and recordings locally; auto-resume upload when network restored

Recommended Hardware Configuration

Typical recommendations for graduation/regional unified exam scenarios. Actual requirements depend on lab seat count, concurrent exam scale, and network conditions.

Regional Supervision Platform

Serves regional education bureaus or exam authorities; aggregates exam and statistics from subordinate schools

Role	Recommended spec	Notes
Server	8-core CPU · 16 GB RAM · 1 TB SSD	Typical for up to 20 schools; scale up by connected school count
Network	Gigabit Ethernet, fixed public IP or dedicated line	VPN or government network recommended between regional and school platforms
Client	Standard office PC + modern browser	Browser access for exam officers and supervisors

Server：Typical for up to 20 schools; scale up by connected school count

Network：VPN or government network recommended between regional and school platforms

Client：Browser access for exam officers and supervisors

School Platform · Standard Exam Venue (24 seats)

Single school, single lab — suitable for daily teaching and regional unified exams

Role	Recommended spec	Notes
School server	8-core CPU · 32 GB RAM · 2 TB SSD	Hosts platform services, recording archival, and exam data; RAID or dedicated storage recommended
Student lab terminal	8 GB RAM · 256 GB SSD · Gigabit NIC	Cross-platform client: Windows 10+, Linux, macOS, domestic OS; 1 per seat
Multi-stream capture	Overhead + side + front camera, 1 stream per seat	USB or network cameras; biology may add electronic eyepiece
Teacher / proctor PC	8 GB RAM · standard office configuration	Browser access to admin and proctoring console; no dedicated client required
Network	Lab gigabit LAN, uplink bandwidth ≥ 100 Mbps	Wired network recommended during exams to reduce wireless interference

School server：Hosts platform services, recording archival, and exam data; RAID or dedicated storage recommended

Student lab terminal：Cross-platform client: Windows 10+, Linux, macOS, domestic OS; 1 per seat

Multi-stream capture：USB or network cameras; biology may add electronic eyepiece

Teacher / proctor PC：Browser access to admin and proctoring console; no dedicated client required

Network：Wired network recommended during exams to reduce wireless interference

School Platform · Large-Scale Exam Venue (48+ seats)

Multi-lab joint exams or large-scale mock exams; upgraded server and bandwidth recommended

Role	Recommended spec	Notes
School server	16-core CPU · 64 GB RAM · 4 TB SSD	Higher concurrent submission and upload load; scale storage by retention period
Student lab terminal	Same as standard venue; unified image batch deployment recommended	Cross-platform client supports mixed OS environments for gradual domestic terminal migration
Network	10 GbE core + gigabit to seat, uplink ≥ 200 Mbps	Staggered submission or seat-priority upload strategy recommended to reduce concurrency
AI review (optional)	8-core CPU · 32 GB RAM · GPU accelerator	Deployable per school or shared regionally for AI-assisted marking

School server：Higher concurrent submission and upload load; scale storage by retention period

Student lab terminal：Cross-platform client supports mixed OS environments for gradual domestic terminal migration

Network：Staggered submission or seat-priority upload strategy recommended to reduce concurrency

AI review (optional)：Deployable per school or shared regionally for AI-assisted marking

Detailed Feature List

Platform foundation, end-to-end workflows and regional oversight for education authorities and schools

Platform Foundation

✓Three-tier private deployment (regional platform, school platform, student terminals)
✓Browser-based admin console — no client installation required
✓Cross-platform student lab terminal client (Windows / Linux / macOS / domestic OS)
✓Software license management for authorized use
✓Encrypted secure data sync between tiers with offline catch-up upload
✓Sync failure queue view and manual retry
✓Exam and lab lesson workflows independent; same terminal reused across scenarios
✓Semester configuration and semester-based statistics filtering
✓Multi-role permissions: admin, exam officer, proctor, marker, lottery officer, teacher
✓Teacher account management, subject binding, and bulk import
✓One-click installation deployment and secure transfer
✓Data backup and system health monitoring
✓Remote terminal version release and upgrade

Exam Scheduling

✓Create, edit, delete, and clone exam tasks
✓Editable in draft/scheduling phase; rules locked after scheduling confirmed
✓Labs designated as exam venues with per-subject venue support
✓Venue start/end dates and assignment of lottery officers and proctors
✓Head proctor and regular proctor role separation
✓Seat-to-paper binding and seat plan spreadsheet import/export
✓Random lottery assignment of seats and papers
✓Lottery results linked to seat plans
✓Intelligent session generation based on venue capacity
✓Session schedule spreadsheet import/export
✓Pre-scheduling validation: unassigned candidates, over-capacity, incomplete venues, etc.
✓Auto-fill unassigned candidates into available seats by capacity
✓One-click confirm scheduling and create all exam sessions
✓Auto-dispatch exam roles to lottery officers and proctors
✓Receive exam tasks and venue/seat/paper configs from regional platform
✓Regional publish and school pull of exam configuration

Exam Papers & Candidates

✓Multi-subject, multi-paper configuration with physics/chemistry concurrent sessions
✓Separate physics and chemistry paper configs; candidates auto-assigned by subject
✓Paper name, ID, subject, grade level, description, and recording duration
✓Three-state paper management: disabled, enabled, deactivated
✓Editing locked after enable per rules; list search/filter and total score display
✓Rich-text question editing with mixed text and images
✓Assessment point setup, rubric criteria, and standard answer configuration
✓Answer sheet sub-questions: single choice, multiple choice, fill-in, drawing, subjective
✓Sub-questions linked to assessment points
✓Answer sheet template images bound to sub-questions
✓Visual editor for bubble-sheet layout and fill regions
✓Biology electronic eyepiece question support
✓Bulk import/export of question banks and media packages
✓Regional question bank template distribution
✓Manual candidate roster maintenance, inline editing, and bulk import
✓Candidate photo upload for terminal verification display and cross-school sync
✓Candidate management by home school
✓Candidate deletion allowed before scheduling lock
✓Auto paper delivery to terminals by candidate, seat, and exam station

Identity Verification & Facial Recognition

✓Account and password verification mode
✓Facial confirmation assist mode (live capture + proctor manual confirmation)
✓Automatic facial matching mode (live photo vs. candidate photo)
✓Proctor forced entry when facial match fails
✓Full audit trail for all forced entry actions
✓Front-facing camera live capture verification on terminals

Digital Answer Sheets & OMR

✓Question-by-question digital answer entry on terminals
✓Auto-save drafts during response
✓Digital answer sheet locked and uneditable after submission
✓Paper answer sheet photo or file upload
✓Terminal displays answer sheet template for reference while filling
✓Digital and paper answer sheet dual-mode coexistence
✓Automatic OMR marking for bubble-sheet objective questions
✓Low-confidence OMR results routed to dedicated manual review page
✓Smart recognition display for handwritten and drawing areas on answer sheets
✓Perspective correction to improve recognition success rate
✓Answer file integrity verification and media metadata recording
✓Automatic scoring for objective questions (single/multiple choice, fill-in)
✓Manual teacher marking for drawing and subjective questions
✓Merged scoring strategy for recognition results and digital answers

Exam Execution & Supervision

✓Composite exam status: not started / in progress / pending papers / marking / completed
✓Marking progress display (marked / total)
✓Exam list filtered by composite status
✓One-click start/stop all sessions at exam level
✓Exam countdown and automatic start at scheduled time
✓Exam pause, resume, and time extension
✓Automatic submission at deadline and proctor forced submission
✓My proctoring tasks and exam proctoring room
✓Exam supervision dashboard with real-time refresh and large-screen view
✓Dedicated exam supervision large-screen page
✓Supervision data table export
✓Seat wall real-time per-seat status display
✓In-exam progress sync to regional platform
✓Seat-priority upload strategy to reduce concurrent load
✓Configurable answer upload scope
✓Answer sheets and recordings reported to regional platform independently or with sessions

Proctoring & Recording

✓Overhead, side, front, and microscope multi-camera configuration
✓Required/optional camera rules per experiment
✓Pre-class validation of seat camera readiness
✓Submission rejected when required camera recordings are missing
✓Network and local camera integration
✓Real-time multi-stream video preview on proctor console
✓Automatic multi-stream merge on submission
✓Full-exam automatic recording archival
✓Synchronized playback of one to four video streams during review
✓Seat online status, network, storage, camera, and bandwidth monitoring

Marking Organization & Quality Control

✓Assign markers, arbitrators, and chief examiners (team leads) by exam group
✓Unified entry for my marking tasks and on-site marking
✓Post-exam centralized marking and on-site marking modes
✓On-site marking linked to proctor console; claim papers by seat
✓Marking seat selection with cross-session persistence
✓Configurable single-marking (on-site) and dual-marking modes
✓Dual-marking deviation threshold settings
✓Average score finalized when dual-marking difference within threshold
✓Automatic escalation to arbitration when dual-marking difference exceeds threshold
✓Round-two arbitrator marking
✓Round-three chief examiner (team lead) final ruling
✓Blind review mode: markers cannot see others' scores
✓Team lead dashboard: overall progress, pending pool, escalation rate
✓Team lead supervision: marker workload, progress by subject/session
✓Team lead supervision: finalized score distribution, mean, and standard deviation
✓Answer tampering alert monitoring and confirmation handling
✓Pending pool claim and random paper assignment
✓Auto-release back to pool on claim timeout
✓Marking dispute application and arbitration pool processing
✓Exam marking settings: AI marking and OMR recognition toggles

Marking & Scores

✓Marking workspace with answer sheets and recordings by group and seat
✓Dynamic layout playback of one to four video streams during review
✓Filter and export by home school (mixed cohort exams)
✓Score export carries current home school filter
✓Dedicated low-confidence OMR review list page
✓AI-assisted review of practical operation videos
✓AI review by experiment code per experiment configuration
✓Step-by-step AI scoring reference by assessment criteria
✓Automatic OMR objective question scoring on answer sheets
✓Separate display of AI score, recognition score, and teacher finalized score
✓Scores include AI score, deviation, and marking status
✓Official score determined by teacher manual finalization
✓Manual retry for AI review exceptions
✓Exam analytics: score distribution, objective accuracy, common errors, option distribution
✓Multi-paper grouped analysis
✓Score list query and table export
✓Home school comparative analysis for mixed cohort exams

Computer-Based Test Assembly & Error Notebook

✓Independent question bank decoupled from practical operation papers
✓Auto paper assembly by question type quota, tags, and difficulty rules
✓Assembly preview, rule validation, and one-click paper generation
✓Re-select questions from saved rules for draft papers
✓Online paper preview and editing
✓Scheduled paper activation at specified time
✓Pass score, exam duration, and other exam parameter configuration
✓Paper delivery strategy: locked question set with shuffled stems and options
✓Paper delivery strategy: random question draw from bank at exam start
✓Consistent question and option order for same candidate after refresh
✓Multiple-choice scoring by correct option count
✓Score statistics: aggregated by class, paper, and session
✓Score statistics table export
✓Teacher error notebook: error count and rate per question
✓Teacher error notebook: statistics by class and by student
✓Error notebook statistics table export
✓Student personal error notebook with cross-session cumulative review
✓Error details with standard answers and explanations
✓Error correction marking and subject filtering
✓Student terminal error notebook and post-exam question review

Regional Supervision

✓School registration, enable/disable, and access credential management
✓Create exam tasks and distribute to designated schools
✓Regional sync of venue, seat, and paper configuration
✓Auto aggregation of sessions, exams, answer sheets, recordings, and details
✓Multi-dimensional cross-school lab lesson statistics
✓Cross-school exam analytics (participation, average score, pass rate, etc.)
✓Real-time exam execution progress view
✓Regional statistics dashboard and report export
✓Batch session catch-up upload and sync management

Highlights

✓Dual marking, arbitration & blind review
✓Facial identity verification
✓Digital answer sheets & OMR recognition
✓Concurrent physics/chemistry sessions
✓Three-tier private deployment

Target Users

•Education bureaus / exam authorities
•Middle schools
•Lab integration service providers

Licensing, Upgrades, Continuity & Data Security

This section outlines our commitments on perpetual software licensing, free online upgrades, power-outage continuity, three-tier city–county–school management, and data security — aligned with the platform’s private upper / school / terminal architecture.

Perpetual Legitimate Software License

We grant the purchaser a perpetual right to use the delivered system software within the contracted scope. The license remains valid after the warranty/support period ends.

Scope

✓Upper-tier platform: school registry, template/exam distribution, cross-school analytics
✓School-tier platform: experiments, lesson plans, sessions, exams, devices & ops
✓Browser-based admin console
✓Student lab terminal (desktop)
✓Installation, setup, backup/ops tooling and documentation

Form of delivery

✓Install packages / container images and deployment manuals
✓Signed digital license bound to organization and environment
✓Source or binaries as contracted
✓Third-party / open-source component inventory and license notices

Free Online Software Upgrades

During warranty and contracted service periods, upgrades (features within scope, fixes, security patches) are provided free of additional license fees.

Upgrade layers

Component	Method	Notes
Platform server	Image/binary update + schema migration	Versioned migrations; backup before upgrade
Admin web	Shipped with server or static update	Bundled under admin path in production
Student terminal	Remote package publish & download	Upload, publish, set current version
Config / topology	Hot reload or restart	No business-data rewrite required

Service coverage

✓Defect fixes and security patches
✓In-scope feature improvements
✓Routine compatibility updates (OS, browser, camera drivers)
✓Release notes, rollback guidance, remote/on-site support

Temporary Power-Outage Continuity

We combine site UPS guidance with software continuity: offline terminal queues, prioritized answer upload, async sync retry, exam pause/resume, and local-first persistence before upper-tier aggregation.

Ops playbook (summary)

Phase	Actions
Outage starts	Confirm UPS; stop new sessions; preserve state; notify proctors
Short outage	Pause timers; do not force-shutdown terminals; resume exams together
Long outage	Formal collection; integrity check of local answers; upload later
Power restored	Health-check services; drain upload queues; finish sync; verify seats

City–County–School Three-Tier

Private three-tier deployment maps to city / county / school education management, with hierarchical distribution, aggregation, RBAC, and local terminal access. Networking and data practices follow national and local education-ICT and e-government requirements.

Role mapping

Tier	Platform role	Responsibilities
City / municipal	Upper platform	School registry, templates/exams, cross-school analytics
County / district	Regional domain / secondary upper	Manage subordinate schools and regional exams
School	School platform	Labs, teaching & exams, local retention, sync upward

Data Security

Coverage includes backup/DR, encryption in transit and at rest (as enabled by site infrastructure), access control, masking/minimization, and auditability for teaching, roster, answer-sheet and media assets.

Key controls

✓Scheduled DB and object-storage backups with restore drills
✓Encrypted transport, token auth, signed inter-tier sync
✓Time-limited pre-signed media upload URLs
✓Display/export masking for IDs and contacts; authenticated exports only
✓Role separation, sync audit trails, integrity checks, least-open ports

Commercial term length, SLAs and liabilities are as contracted.

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