It's a good idea for students to keep a record of everything they've learnt so that they can refer back to it and use it to track their progress. This is an important part of the course as it will also help teachers to see how their students are developing and to understand how they are getting on with the course. Plus, when they are ready to Pass On their new skills, they can use their learner records to remind them what they've done.
Please note, there is also a word document version of the Learner Record available. Find it at http://www.edexcel.com/quals/skills/home-cooking/Pages/default.aspx