Who we are
Donat Sciences and Maths (www.donatstem.co.rw) is a free practice website for Senior 1 to Senior 6 students in Rwanda, made by BIZIYAREMYE Donat, Senior Physics and STEM Teacher at GS BYUMBA INYANGE. Contact: WhatsApp 0788 804 242.
No account, no password
You can use the quizzes and practice books without creating an account. We do not ask for your name, email address or phone number to use the site.
Information stored on your own device
To make the site work, your browser keeps a few small pieces of information on your phone or computer only: your quiz scores and progress, your accessibility settings (text size, contrast, dark mode), and the print codes you have unlocked. This information is not sent to us. You can delete it at any time by clearing your browser data for this site.
When you contact us or pay
When you buy a worked-solution pack or a print service, you pay with MTN MoMo and send us a WhatsApp message with your name, school and, if you wish, your MoMo transaction ID. We use these details only to check your payment and send you your PDF or print code. We do not sell or share them. WhatsApp and MTN MoMo have their own privacy policies.
Suggestion box and mistake reports
The suggestion box and the "Report a mistake" buttons prepare a WhatsApp message to the teacher. Nothing is stored on this website. Your name and school are optional, and the box removes long numbers (such as phone numbers) from your message. Please never write passwords, PINs or MoMo codes.
Hosting and security
The site is hosted by Cloudflare. Like every web host, Cloudflare processes technical information such as your IP address to deliver the pages and protect the site from attacks.
Google services, cookies and advertising
We use Google Search Console to see how people find the site in Google search; it gives us totals, not information about individual students. The site may show advertising from Google AdSense. Google and its partners use cookies to show ads and to measure them. These cookies may use your visits to this and other websites to show ads that interest you.
You can turn off personalised advertising in Google's Ad Settings, and learn more at How Google uses information from sites that use its services. You can also block or delete cookies in your browser settings.
Children and students
The site is made for secondary school students. We do not knowingly collect personal information from children. Students under 18 should ask a parent or teacher before paying for any service.
Changes and questions
If we change this policy, we will update this page and the date at the top. For any question about your information, send a WhatsApp message to 0788 804 242.