AQA Required practical for GCSE Chemistry, Trilogy and Synergy.
There are 15 video clips showing the reaction at 5 concentrations so that students can measure the time taken for the cross to disappear. These concentrations are repeated three times. The concentrations and repeats provided here link with the Collins Required Practical handbook but the tests can be used as a stand alone aid.
Concentrations are
40g/dm3
32g/dm3
24g/dm3
16g/dm3
8g/dm3
10cm3 of 1M hydrochloric acid is added each time. Practical was carried out at room temperature (22oC)
Students would normally be required to prepare their own concentrations by diluting 40g/dm3 sodium thiosulfate. We made the different concentrations required with orange squash so that the dilution effect could be clearly seen. This also enabled students to practice accurate volume measurements with safe solutions.
I developed this practical aid so that lower ability students could obtain a full set of effective results. Using the videos allows the students to focus on accuracy of measurement (they used their own stopwatches), reasons for repeats, prediction, pattern recognition etc without getting bogged down in multiple volume measurements and lost in a very long practical.
Introductory activity for intro to atomic structure or energy topic. Also used for energy resources discussion and link to ethics - should the baby be sacrificed for the good of humankind's energy needs? (someone will realise eventually that substituting 3kg of rubbish solves the problem). Can also be used to practice standard form and for figuring out how to estimate a figure.
Feedback sheet for use by teacher or for self/peer assessment. I use this with marker pens. www in points coloured in green. ebi points coloured in pink. Following feedback Students have to mark the parts of their graph which are correct in green and modify where possible the ebi points. Could also be used prior to drawing a graph to remind students of requirements.
Currently suitable for scatter graphs but could be modified easily for other types of graph.
A set of 25 revision cards. They are designed to help students build links between the different concepts. Cards can be read in any order and eg sorted into 'understand' and 'don't understand'
I have used them effectively to stimulate group discussion and peer support half way through the topic. Further information about the association modelling process used to design them can be found on the website. Comments and ideas welcomed. Thanks for looking!
I have used the new prezi format to develop a process for making a videocast, which can be used at KS3 to add breadth to the methods of feeding back information. I developed this for an APP task with a high achieving Yr 7 Science group who were having trouble getting to grips with what was required for a successful videocast. The PDF documents shows what is in the slides on the presentation. The presentation is available online at the web link given. Feedback would be much appreciated. Many thanks.