If you are looking for math practice, please have your child visit powerstudent.org - they are all familiar with it.
The kids know how much I love this site, and they love it too! It is geared towards gr.4-6 and has resources for parents (under parent note in each stream of math), practice tests, worksheets and links to interactive games. Use it to your own discretion, but I recommend choosing a strand for your child and have them work it from beginning to end in 20-30mins sittings. What's brilliant about this site is that the videos and instruction start as review for our 6's because it begins at about a grade 4 level and gradually works up to the gr.6 Ontario expectations for that math strand.
After March break we were going to start a brand new unit on Measurement so that's not a bad place to start. You could also take a hands on approach and talk about measurement while cooking or baking! Again this is all to be implemented in a way that works best for you and your family and child.
Overall Expectations
By the end of Grade 6, students will:
• estimate, measure, and record quantities, using the metric measurement system;
• determine the relationships among units and measurable attributes, including the area of a parallelogram, the area of a triangle, and the volume of a triangular prism.
Specifics
– demonstrate an understanding of the relationship between estimated and precise measurements, and determine and justify when each kind is appropriate (Sample problem:You are asked how long it takes you to travel a given distance. How is the method you use to determine the time related to the precision of the measurement?)
– estimate, measure, and record length, area, mass, capacity, and volume, using the metric measurement system.
– select and justify the appropriate metric unit (i.e., millimetre, centimetre, decimetre, metre, decametre, kilometre) to measure length or distance in a given real-life situation (Sample problem: Select and justify the unit that should be used to measure the perimeter of the school.)
– solve problems requiring conversion from larger to smaller metric units (e.g., metres to centimetres, kilograms to grams, litres to millilitres) (Sample problem: How many grams are in one serving if 1.5 kg will serve six people?)
Additional Sites
https://www.khanacademy.org/ - practice videos, questions, assessments, track progress etc.
https://mathantics.com/ - also provides free videos on YouTube