Here is a short one-line description for each activity in the "B.5 Current and Circuits Activity Pack" and their usefulness for a teacher in an IBDP Physics classroom:

1. Activity 1: Circuit Symbol Matching Game and Simple Circuit Construction - Helps students recognize circuit symbols and build basic circuits for foundational understanding.
2. Activity 2: Ohmic vs. Non-Ohmic Device Testing and Analysis - Guides students in testing and analyzing the behavior of Ohmic and non-Ohmic devices.
3. Activity 3: Ideal vs. Non-Ideal Instrument Effects in Circuits - Demonstrates the impact of ideal vs. non-ideal measuring instruments in circuit analysis.
4. Activity 4: Build-a-Circuit Challenge - Understanding Series and Parallel Circuits - Challenges students to construct series and parallel circuits to solidify their knowledge.
5. Activity 5: Resistance Variation Experiment - Investigating the Effect of Temperature on Ohmic and Non-Ohmic Devices - Explores how temperature affects resistance in different types of devices.
6. Activity 6: Ammeters and Voltmeters in Real Life Circuits - Understanding Instrument Limitations - Teaches students the practical limitations of ammeters and voltmeters in circuit applications.
7. Activity 7: Series and Parallel Resistance Investigation - Engages students in calculating and verifying resistance in series and parallel circuits.
8. Activity 8: Ohm’s Law Verification and Deviations - Identifying Situations Where Ohm’s Law Might Not Hold - Verifies Ohm’s Law and identifies scenarios where it may not apply.
9. Activity 9: Circuit Construction Simulator - Virtual Exploration of Series and Parallel Circuits - Uses virtual simulations to explore and analyze series and parallel circuits.

These activities provide a comprehensive toolkit for teaching current and circuit principles, ensuring students grasp theoretical and practical aspects of circuit analysis in an IBDP Physics classroom.