Before delving into the condition-specific links below, it is worth bearing in mind that some simple approaches are highly appreciated by students with SpLD:
Reduce your 'teacher talk' and simplify your language
Provide explicit, step-by-step instructions, and repeat if necessary
Check in with students to ensure they can tell you what they need to do
Allow extra time for students to complete activities
Sit students away from distractions and with good role models
Reduce copying from the board, and use dyslexia-friendly fonts and backgrounds in your presentations
Use Cloze activities to check understanding and reduce writing
Provide learning materials, such as PowerPoints, at the start of the lesson, and allow students to access these using their device
Allow them to take class notes using their device, and check they are organising these effectively (e.g. let them create a Google Document for a new topic, which they then share with you)
Use graphic organisers to help students with planning, organising, and sequencing
Use check-lists for students to tick off aspects of a longer task as they progress
General strategies, along with the rationale for their use, can be found in this PDF
This excellent mini-guide provides ideas for classroom organisation as well as suggested teaching approaches
Suggested strategies to support dyspraxic students in PE lessons can be found here
Classroom strategies, along with the rationale for their use, can be found in this PDF
Research and diagnostic testing for dyscalculia is still in its infancy. Many of the general suggestions above will be helpful for students with the condition. This website provides a nice summary of useful approaches.
Some more detailed tips can be found in this PDF