This is a useful tool for students to practice numbers, time, and routine. This could be set as homework but it would be hard for me to assess their success, it would probably be best used in the classroom or as a resource for students to practice their Spanish independently.
Access to songs and song lyrics. The songs are divided into teaching categories and includes a section on numbers. This would be a nice activity to do during class time and would provide students with a unique way to learn numbers.
This website offers an opportunity to practices numbers in the context of birthdays and dates. Students select the correct phrases in Spanish and can listen to the language. This would be a good way for students to practice numbers in these forms. I was a bit concerned about the amount of English on the website so I would only use this in a limited way.